1 /*- 2 * Copyright (c) 2002-2003 M. Warner Losh. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #ifndef DEVD_HH 30 #define DEVD_HH 31 32 class config; 33 34 /** 35 * var_list is a collection of variables. These collections of variables 36 * are stacked up and popped down for each event that we have to process. 37 * We have multiple levels so that we can push variables that are unique 38 * to the event in question, in addition to having global variables. This 39 * allows for future flexibility. 40 */ 41 class var_list 42 { 43 public: 44 var_list() {} 45 virtual ~var_list() {} 46 /** Set a variable in this var list. 47 */ 48 void set_variable(const std::string &var, const std::string &val); 49 /** Get the variable out of this, and no other, var_list. If 50 * no variable of %var is set, then %bogus will be returned. 51 */ 52 const std::string &get_variable(const std::string &var) const; 53 /** Is there a variable of %var set in thi stable? 54 */ 55 bool is_set(const std::string &var) const; 56 /** A completely bogus string. 57 */ 58 static const std::string bogus; 59 static const std::string nothing; 60 private: 61 std::map<std::string, std::string> _vars; 62 }; 63 64 /** 65 * eps is short for event_proc_single. It is a single entry in an 66 * event_proc. Each keyword needs its own subclass from eps. 67 */ 68 class eps 69 { 70 public: 71 eps() {} 72 virtual ~eps() {} 73 /** Does this eps match the current config? 74 */ 75 virtual bool do_match(config &) = 0; 76 /** Perform some action for this eps. 77 */ 78 virtual bool do_action(config &) = 0; 79 }; 80 81 /** 82 * match is the subclass used to match an individual variable. Its 83 * actions are nops. 84 */ 85 class match : public eps 86 { 87 public: 88 match(config &, const char *var, const char *re); 89 virtual ~match(); 90 virtual bool do_match(config &); 91 virtual bool do_action(config &) { return true; } 92 private: 93 std::string _var; 94 std::string _re; 95 regex_t _regex; 96 }; 97 98 /** 99 * media is the subclass used to match an individual variable. Its 100 * actions are nops. 101 */ 102 class media : public eps 103 { 104 public: 105 media(config &, const char *var, const char *type); 106 virtual ~media(); 107 virtual bool do_match(config &); 108 virtual bool do_action(config &) { return true; } 109 private: 110 std::string _var; 111 int _type; 112 }; 113 114 /** 115 * action is used to fork a process. It matches everything. 116 */ 117 class action : public eps 118 { 119 public: 120 action(const char *cmd); 121 virtual ~action(); 122 virtual bool do_match(config &) { return true; } 123 virtual bool do_action(config &); 124 private: 125 std::string _cmd; 126 }; 127 128 class event_proc 129 { 130 public: 131 event_proc(); 132 virtual ~event_proc(); 133 int get_priority() const { return (_prio); } 134 void set_priority(int prio) { _prio = prio; } 135 void add(eps *); 136 bool matches(config &); 137 bool run(config &); 138 private: 139 int _prio; 140 std::vector<eps *> _epsvec; 141 }; 142 143 class config 144 { 145 public: 146 config() { _pidfile = ""; push_var_table(); } 147 virtual ~config() { reset(); } 148 void add_attach(int, event_proc *); 149 void add_detach(int, event_proc *); 150 void add_directory(const char *); 151 void add_nomatch(int, event_proc *); 152 void add_notify(int, event_proc *); 153 void set_pidfile(const char *); 154 void reset(); 155 void parse(); 156 void close_pidfile(); 157 void open_pidfile(); 158 void write_pidfile(); 159 void remove_pidfile(); 160 void push_var_table(); 161 void pop_var_table(); 162 void set_variable(const char *var, const char *val); 163 const std::string &get_variable(const std::string &var); 164 const std::string expand_string(const std::string &var); 165 char *set_vars(char *); 166 void find_and_execute(char); 167 protected: 168 void sort_vector(std::vector<event_proc *> &); 169 void parse_one_file(const char *fn); 170 void parse_files_in_dir(const char *dirname); 171 void expand_one(const char *&src, std::string &dst); 172 bool is_id_char(char); 173 bool chop_var(char *&buffer, char *&lhs, char *&rhs); 174 private: 175 std::vector<std::string> _dir_list; 176 std::string _pidfile; 177 std::vector<var_list *> _var_list_table; 178 std::vector<event_proc *> _attach_list; 179 std::vector<event_proc *> _detach_list; 180 std::vector<event_proc *> _nomatch_list; 181 std::vector<event_proc *> _notify_list; 182 }; 183 184 #endif /* DEVD_HH */ 185